Spring Boot使用bean内部配置

Question

@Configuration
@AutoConfigureOrder()
@ComponentScan("scanPath")
public class AutoConfiguration {    

    @Autowired
    private Factory   factory;

    @Bean("factory")
    @ConditionalOnProperty(prefix = "application.middleware", name = "enabled", havingValue = "true")
    public Factory getFactory() {
        return new Factory();
    }

    @Bean("binding")
    @DependsOn("factory")
    public Binding getMarketingDataSource() {
        return factory.getInstance("bindingName");
    }
}    

我想：1.初始化bean工厂（如果找不到值，可以为null）2.自动绑定并由bean绑定使用

但是现在我得到了例外

Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'factory': Requested bean is currently in creation: Is there an unresolvable circular reference?

所以我想要在绑定中使用工厂，如何制作？ 谢谢！

Answer 1

使用getFactory()获取Bean（并删除@Autowired ）：

public Binding getMarketingDataSource() {
    return getFactory().getInstance("bindingName");

Answer 2

将工厂连接到签名中，现在Spring看到绑定需要工厂并为您设置它：

@Bean("binding")
public Binding getMarketingDataSource(Factory factory) {
  return factory.getInstance("bindingName");
}